EP1001654A3 - Sound signal mixing - Google Patents

Sound signal mixing Download PDF

Info

Publication number
EP1001654A3
EP1001654A3 EP99305783A EP99305783A EP1001654A3 EP 1001654 A3 EP1001654 A3 EP 1001654A3 EP 99305783 A EP99305783 A EP 99305783A EP 99305783 A EP99305783 A EP 99305783A EP 1001654 A3 EP1001654 A3 EP 1001654A3
Authority
EP
European Patent Office
Prior art keywords
signal
surround
monophonic
surround signal
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99305783A
Other languages
German (de)
French (fr)
Other versions
EP1001654A2 (en
EP1001654B1 (en
Inventor
Richard J. Aylward
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bose Corp
Original Assignee
Bose Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bose Corp filed Critical Bose Corp
Publication of EP1001654A2 publication Critical patent/EP1001654A2/en
Publication of EP1001654A3 publication Critical patent/EP1001654A3/en
Application granted granted Critical
Publication of EP1001654B1 publication Critical patent/EP1001654B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other

Abstract

A method of down mixing a plurality of signals including at least a left surround signal, a right surround signal, a left signal and a right signal into a stereophonic pair that is a left transmitted signal and a right transmitted signal includes summing the left surround and right surround signals to provide a monophonic surround signal, filtering the monophonic surround signal to provide a filtered monophonic signal having properties related to the diffraction pattern around the head of a listener, multiplying the filtered monophonic surround signal with a right coefficient signal related to the ratio of the magnitude of the right surround signal to the sum of the magnitudes of the left surround signal and the right surround signal to provide a left product signal and multiplying the filtered monophonic surround signal with a left coefficient signal related to the ratio of the magnitude of the left surround signal to the sum of the magnitudes of the left surround signal and the right surround signal to provide a right product signal, combining signals related to the left product signal and the left front signal to provide the left transmitted signal, and combining signals related to the right product signal and the right front signal to provide the right transmitted signal.
EP99305783A 1998-07-27 1999-07-21 Sound signal mixing Expired - Lifetime EP1001654B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/122,988 US6721425B1 (en) 1997-02-07 1998-07-27 Sound signal mixing
US122988 1998-07-27

Publications (3)

Publication Number Publication Date
EP1001654A2 EP1001654A2 (en) 2000-05-17
EP1001654A3 true EP1001654A3 (en) 2002-01-02
EP1001654B1 EP1001654B1 (en) 2009-02-18

Family

ID=22406075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99305783A Expired - Lifetime EP1001654B1 (en) 1998-07-27 1999-07-21 Sound signal mixing

Country Status (4)

Country Link
US (1) US6721425B1 (en)
EP (1) EP1001654B1 (en)
JP (2) JP4041249B2 (en)
DE (1) DE69940418D1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5912976A (en) * 1996-11-07 1999-06-15 Srs Labs, Inc. Multi-channel audio enhancement system for use in recording and playback and methods for providing same
US7016501B1 (en) * 1997-02-07 2006-03-21 Bose Corporation Directional decoding
CN1319051C (en) * 1997-11-21 2007-05-30 日本胜利株式会社 Encoding apparatus of audio signal, audio disc and disc reproducing apparatus
US6956954B1 (en) * 1998-10-19 2005-10-18 Onkyo Corporation Surround-sound processing system
US6175631B1 (en) * 1999-07-09 2001-01-16 Stephen A. Davis Method and apparatus for decorrelating audio signals
CN1541500A (en) * 2000-08-28 2004-10-27 �ʼҷ����ֵ������޹�˾ System for generating sounds
US7457425B2 (en) * 2001-02-09 2008-11-25 Thx Ltd. Vehicle sound system
US7433483B2 (en) 2001-02-09 2008-10-07 Thx Ltd. Narrow profile speaker configurations and systems
US7254239B2 (en) * 2001-02-09 2007-08-07 Thx Ltd. Sound system and method of sound reproduction
JP4988716B2 (en) 2005-05-26 2012-08-01 エルジー エレクトロニクス インコーポレイティド Audio signal decoding method and apparatus
WO2006126843A2 (en) * 2005-05-26 2006-11-30 Lg Electronics Inc. Method and apparatus for decoding audio signal
TWI344638B (en) * 2006-01-19 2011-07-01 Lg Electronics Inc Method and apparatus for processing a media signal
WO2007091849A1 (en) * 2006-02-07 2007-08-16 Lg Electronics Inc. Apparatus and method for encoding/decoding signal
US8050434B1 (en) * 2006-12-21 2011-11-01 Srs Labs, Inc. Multi-channel audio enhancement system
KR101485462B1 (en) * 2009-01-16 2015-01-22 삼성전자주식회사 Method and apparatus for adaptive remastering of rear audio channel
CN102428512A (en) * 2009-06-02 2012-04-25 松下电器产业株式会社 Down-mixing device, encoder, and method therefor
US9088858B2 (en) 2011-01-04 2015-07-21 Dts Llc Immersive audio rendering system
US9131313B1 (en) * 2012-02-07 2015-09-08 Star Co. System and method for audio reproduction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123902A (en) * 1978-03-20 1979-09-26 Toshiba Corp Stereo reproducer
JPH06165079A (en) * 1992-11-25 1994-06-10 Matsushita Electric Ind Co Ltd Down mixing device for multichannel stereo use
WO1998020709A1 (en) * 1996-11-07 1998-05-14 Srs Labs, Inc. Multi-channel audio enhancement system for use in recording and playback and methods for providing same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69433258T2 (en) * 1993-07-30 2004-07-01 Victor Company of Japan, Ltd., Yokohama Surround sound signal processing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123902A (en) * 1978-03-20 1979-09-26 Toshiba Corp Stereo reproducer
JPH06165079A (en) * 1992-11-25 1994-06-10 Matsushita Electric Ind Co Ltd Down mixing device for multichannel stereo use
WO1998020709A1 (en) * 1996-11-07 1998-05-14 Srs Labs, Inc. Multi-channel audio enhancement system for use in recording and playback and methods for providing same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 145 (E - 155) 30 November 1979 (1979-11-30) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 488 (E - 1605) 12 September 1994 (1994-09-12) *

Also Published As

Publication number Publication date
JP2000083300A (en) 2000-03-21
JP2007325311A (en) 2007-12-13
JP4041249B2 (en) 2008-01-30
EP1001654A2 (en) 2000-05-17
EP1001654B1 (en) 2009-02-18
DE69940418D1 (en) 2009-04-02
US6721425B1 (en) 2004-04-13

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